I am new to the NHRA stock eliminator field and I was just informed that the original class designation of A/SA and B/SA were no longer applicable. What class would our 2010 Drag Pak Challenger with the 6.1 Hemi and an automatic fall in to???

I am new to the NHRA stock eliminator field and I was just informed that the original class designation of A/SA and B/SA were no longer applicable. What class would our 2010 Drag Pak Challenger with the 6.1 Hemi and an automatic fall in to???